This necklace is available in 3 gemstone patterns. October birthdays, get ready to indulge yourself with this very unique October birthstone necklace! If you are looking for yellow gold or white gold, other customization, please contact us! Opal & Diamond Necklace * Center stone size: ≈3mm opal * Side stones: ≈1.5mm x2 G SI ethically sourced diamond * 16inch diamond cut chain * Solid 14k rose gold Pink Tourmaline & Diamond Necklace * Center stone size: ≈3mm pink tourmaline * Side stones: Delicate Rose Gold Gemstone Necklaces, Delicate Rose Gold Gemstone Necklace, Dainty Rose Gold Opal Jewelry, Delicate Rose Gold Round Pendant Birthstone Necklace, Delicate Rose Gold Opal Jewelry, Dainty Rose Gold Birthstone Necklace With Round Pendant, Delicate Rose Gold Birthstone Necklace With Delicate Chain, Elegant Pink Opal Round Necklace, Rose Gold Sterling Silver Necklace With Ethical Gemstones